<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="allsCheckHandle"/>
    </label>
    <span>
          <span>已完成{{checkNumber}}</span> / 全部{{ todoList.length }}
    </span>
    <button class="btn btn-danger" @click="allDeleteHandle">清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "Footer",
  props: ['todoList','checkAllHandle','allDeleteHandle'],
  computed:{
    allsCheckHandle:{
      get(){
        return (
            this.todoList.every((item) => item.chose) && this.todoList.length !== 0
        );
      },
      set(value){
        this.checkAllHandle(value)
      }
    },
    checkNumber(){
      return this.todoList.reduce((p,c)=>c.chose?p+1:p,0)
    }
  }
}
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>